Abstract
The effect of distributed particles on the recrystallization behaviors of five kinds of cold-rolled S.A.P. containing 1.2∼12.7 wt%Al2O3 was investigated. The recrystallization temperature of the cold-rolled S.A.P. with a low oxide content is nearly identical to that of pure aluminum. But the recrystallization temperature rises with increase in oxide content, and alloys with a high oxide content above 8 wt% do not recrystallize up to a temperature near the melting point of matrix. On the other hand, the hot-extruded S.A.P. do not recrystallize by annealing up to 500°C for 1 hr. Recrystallized grains of the cold-rolled S.A.P. with a low oxide content are extremely coarsened and grown two-dimensionally, but the alloys with a high oxide content show fine grains after recrystallization at high temperatures.
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